The HSE has ordered extra supplies of the flu vaccine over concerns about an epidemic during winter.
It has confirmed up to 1.1 million doses have been ordered - a 14% increase on last year.
The HSE also says there has been a gradual rise in uptake of the vaccine in recent years.
It is encouraging healthcare workers and those in at-risk groups, including the over 65s and pregnant women, to get vaccinated.
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